Please help! I need advice

I just recently took the nclex and failed. I felt soooooo horrible. That was the one thing i was terrified of was failing so poorly. I almost think i focused on that way too much. I honestly felt like i knew my material when i was preparing for this test. All my friends felt like i was more prepared than anyone. And i know no one can be completely prepared for this test, but i knew alot of core content as the Hurst Review lady said you must know. However, i had absolutely no faith or confidence in myself. Is there anyone out there who actually felt like you knew alot was almost more prepared as you could be and failed? Do you think it could have been my nerves? B/c even though i felt like i knew my stuff i was very nervous. Also do you think my not having any faith and confidence played a role? I really need some advice before taking it again. But i have promised myself not to be so hard on myself and i will have more confidence and faith in "GOD".